Table 2. Continuous Variables for Nonsmoking US Women From the National Health Interview Survey, 1997–2000.
| Variable | Breast Cancer |
No Cancer |
Total |
|||
|---|---|---|---|---|---|---|
| Sample Mean | Population Mean (SE) | Sample Mean | Population Mean (SE) | Sample Mean | Population Mean (SE) | |
| BMI, kg/m2 | 26.9 | 26.8 (0.18) | 26.6 | 26.3 (0.04) | 26.6 | 26.3 (0.04) |
| Duration from breast cancer diagnosis to survey, y | 7.7 | 9.8 (0.42) | 0.0 | 0.0 | 7.7 | 9.8 (0.42) |
| Mortality follow-up, y | 6.7 | 8.5 (0.04) | 7.3 | 8.5 (0.01) | 7.3 | 8.5 (0.01) |
| Age at survey, y | 67.8 | 66.8 (0.59) | 46.8 | 44.6 (0.15) | 47.3 | 45.0 (0.16) |
| Age at death, y | 79.5 | 78.4 (0.97) | 79.1 | 77.9 (0.35) | 79.1 | 77.9 (0.33) |
Abbreviations: BMI, body mass index; SE, standard error.